You could get higher than a 161 or much lower. I got a 169 the week before the LSAT, and when I took it I got a 161. Do not think about your scores, just focus on learning the material and your pacing, and worry about your score after the test.
If I were you, which I can not be, I would practice at least 6 hours a day until october. And if I am not averaging 165+ comfortably by then, I would practice harder for the december exam, and not take the october.
really man, take it from me (2L), LSAT = everything, and you only get two shots, so make sure you give it your all, and then give more, and then even more--
NEVER fall into a position of either fear, panic, comfort or cockiness. This is bad.
There is no luck on that test, there are the skilled and unskilled. The choice is yours.